Pile mould for PCC pile and construction method for overlong PCC pile

Abstract

The invention discloses a pile mould for a PCC pile and a construction method for an overlong PCC pile. The pile mould consists of a feeding section, one or more segments of intermediate sections and a pile tip section which are connected sequentially; the connection among the sections can be disassembled; and inner pipes of the sections at connecting ends are longer than outer pipes, the inner pipes are connected directly at a connecting position, and the outer pipes are connected by outer pipe connecting sections. The construction method for the overlong PCC pile comprises the following steps: firstly, sinking the pile tip section of the pile mould in foundation soil, and then sinking one or more segments of intermediate sections in the foundation soil until the sunk pile mould reaches a designed pile length; and after concrete is poured, pulling out the pile mould in a subsection mode. The construction method overcomes the restriction to the length of the PCC pile, and the pile length of the PCC pile for construction is increased greatly through the connection of the pile mould of each section so as to implement the construction of the overlong PCC pile. The pile mould can adapt to requirements of different pile lengths due to the detachable pile mould, and is convenient to transport; and the sections of the pile mould are simple in connection and convenient in operation.

Description

technical field [0001] The invention relates to a pile foundation construction machine tool and a method, in particular to a PCC pile formwork and a construction method of a super-long PCC pile. Background technique [0002] Cast-in-situ concrete large-diameter pipe piles (referred to as PCC piles, patent numbers 02112538.4 and 01273182.X) use vibration to sink the steel inner and outer double-layer casing cavity structures into the foundation design depth under the protection of closed movable valve pile shoes , inject concrete evenly into the cavity of the structure through the concrete divider, and then vibrate to set out the cavity structure. In the groove, cast-in-place concrete thin-walled pipe piles are formed. The outer diameter of the PCC pile is generally 1.0 to 1.5 meters, the wall thickness is 10 to 15 centimeters, and the length of the sinking tube is 20 to 25 meters. PCC piles obtain greater bearing capacity with less concrete consumption, so it is an economi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pile formwork for PCC piles and a construction method for super-long PCC piles thereof, which can overcome the defects that the length of pile formwork in existing methods is limited by construction equipment and the depth of foundation treatment is limited, so that PCC piles can be The pile length of the construction is greatly increased

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